Annual, erect herbs. Leaves alternate, lanceolate, entire. Flowers
small, sessile, in lateral and terminal peduncled, dense, cylinderic spikes,
with a conical apex, bracts distinct, bracteoles 2. Sepals connate in a
half-superior calyx, limb 5-fid, lobes ovate. Petals 5, connate in an
epigynous, campanulate, 5-lobed corolla. Stamens 5, adnate to corolla tube.
Ovary 2-celled, ovules many, stigmas obscurely 2-lobed. Fruit a capsule,
membranous below, the crown above the calyx limb, hard, depressed-conical.